Over the last 20 years, roof support technology has made numerous advances
since the original wedge and slotted bolts of the 1950's. By comparison, the
roof supports used today are more complex and specialized than the supports used
in the past, providing mines with a varied selection of supports from which to
choose. As a result, when problems with supports are encountered, it is more
difficult to determine whether it is the result of geological changes, poor
installation practices, or malfunctioning supports.
The purpose of this guide is to provide a logical sequence to resolving the most common problems
encountered with roof supports.
The information contained in this program was originally published as MSHA IR
The authors are Raymond A. Mazzoni, George J. Karabin, and Joseph A. Cybulski.